i18n implemented. en.yml translation file not finished yet, just a reference.
Added full i18n support and extracted texts to en.yml file.
Reworked shortcuts / next & previous

- next and previous shortcut now toggle story
- when a story is toggled, screen is scrolled
- added b as a shortcut to open permalink to match Reeder shortcuts
- permalink now targets _blank
Made links open in background tab

Got to pack some OS detection for guessing ctrl/cmd key
Added a few more tests and changed some translation strings.
Removed meta key trick to open in bg

Permalink has no target (html)
When key [b] or [v] is pressed, it opens in a new window (tab) in
foreground.
remove stray quote
fix css issues caused by feed/story list borders.
small tweaks. dont toggle stories at the ends.
Merge branch 'pr/44'
check if original url is feed before trying to discover.
Added bin folder to gitignore
Merge pull request #49 from Who828/better-gitignore

Added bin folder to gitignore
Brazilian Portuguese translation
`pt`, not `en`
Merge pull request #51 from jmonteiro/master

Brazilian Portuguese translation
Merge remote-tracking branch 'upstream/master'

Conflicts:
	app/views/partials/_story.erb - Fixed.